same here, i've got a mythbuntu box at one location, and a lubuntu box with mythtv at home, and neither are downloading with mythfilldatabase, since friday. both are running .27. no changes were made to either box, just suddenly not able to download schedules.

I figured out the problem. I removed a DNS entry that was being used by the old Tribune DNS name.

If you failed, that means you never adjusted your system for self hosting when we told you last year. When the Tribune DNS entry goes away (which I'm surprised it hasn't already) you'll stop working. Please upgrade your system or edit /etc/hosts